Home / 21,159.93-29,200.71-11,728.49

Finding the Fourth Proportional to 21,159.93, 29,200.71 and 11,728.49

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Solution

The fourth proportional to 21,159.93, 29,200.71 and 11,728.49 is: 16,185.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.93 : 29,200.71 = 11,728.49 : x
  2. Step 2: Convert to fraction form
    21,159.93/29,200.71 = 11,728.49/x
  3. Step 3: Cross multiply
    21,159.93x = 29,200.71 × 11,728.49
  4. Step 4: Simplify right side
    21,159.93x = 342,480,235.23
  5. Step 5: Solve for x
    x = 342,480,235.23/21,159.93
  6. Step 6: Final answer
    x = 16,185.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.